CEI EN 61788-12
Superconductivity Part 12: Matrix to superconductor volume ratio measurement - Copper to non-copper volume ratio of Nb3Sn composite superconducting wires
| Organization: | CEI |
| Publication Date: | 1 April 2014 |
| Status: | active |
| Page Count: | 36 |
| ICS Code (Superconductivity and conducting materials): | 29.050 |
scope:
This part of IEC 61788 describes a test method for determining the copper to non-copper volume ratio of Cu/Nb3Sn wires.
The test method given hereunder is applicable to Nb3Sn composite superconducting wires with a cross-sectional area of 0,1 mm2 to 3,0 mm2 and a copper to non-copper volume ratio of 0,1 or more. It does not make any reference to the filament diameter; however, it is not applicable to those superconducting wires with their filament, Sn, Cu-Sn alloy, barrier material and other non-copper portions dispersed in the copper matrix or those with the stabilizer dispersed. Furthermore, the copper to non-copper volume ratio can be determined on specimens before or after the Nb3Sn formation heat treatment process.
The Cu/Nb3Sn wire has a monolithic structure with a round or rectangular cross-section.
Though uncertainty increases, this method may be applicable to the measurement of the copper to non-copper volume ratio of the Cu/Nb3Sn wires whose cross-section and copper to non-copper volume ratio fall outside the specified ranges.
This test method may be applied to other composite superconducting wires after some appropriate modifications.
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